CCbill changes on popular dating site

We have a popular niche adult site that needs some changes primarily to do with our payment processor, ccbill and our software, vldpersonals.com. It is very important that all these changes happen without any issues. It is a popular live site, so mistakes can not occur as they would affect thousands of members. Please be confident and experienced in your skills with ccbill and vldpersonals before bidding. The software we use can be found at vldpersonals.com. 1) Change prices of the upgrades - upgrade page will also need to be modified to reflect prices 2) Currently the site offers a trial for 3 days for members that is paid at a minimal price. We want to make it so the trial pricing for 3 days is only available to each user once, after that they must choose one of the other payment options or go directly to the monthly price. This feature is called Limit Customers to one trial subscription banking rule on ccbill, however, checkout forms will also have to be modified accordingly. 3) Add a upsell that allows users a new type of membership that allows even free users to reply to paid users even when they are free (currently only paid users can reply to messages). This is a "gold membership" upsell that we want added. In the backend the software can easily create that kind of membership type (Eg. I can do it) however, it must be properly integrated into the system and ccbill so accounts are upgraded properly and that the upsell is presented appropriately on every check out. 4) There is a error that when users cancel and another user tries to reply to one of their old messages it tells the user to upgrade. I want the text to be fixed so it tells the user that the user they are attempting to contact is no longer a member. Ideally you should have experience with CCbill